Continental Airlines has joined rival Delta in boosting the price for checking bags on flights within the USA and to Puerto Rico, Canada and the U.S. Virgin Islands.

Delta began charging $8 more for the first checked bag and $7 more for a second on Jan. 5. Continental did the same thing beginning with tickets sold Jan. 16. So far, no other big U.S. airline has followed suit.

Continental and Delta now charge $25 for the first checked bag and $35 for the second if the bags are checked at the airport. The fee is slightly lower for bags checked in online.